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Klymenko, S.V.* ; Bink, K. ; Trott, K.-R.* ; Bebeshko, V.G.* ; Bazyka, D.A.* ; Dmytrenko, I.V.* ; Abramenko, I.V.* ; Bilous, N.I.* ; Zitzelsberger, H. ; Misurin, A.V.* ; Atkinson, M.J. ; Rosemann, M.

MLL gene alterations in radiation-associated acute myeloid leukemia.

Exp. Oncol. 27, 71-75 (2005)
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Aim: Although acute myelogenous leukemia (AML) arising after radiation exposure is considered to be secondary, little is known about the molecular mechanisms by which the radiation induces the leukemogenic phenotype. The aim of the study was to analyze whether the MLL translocations are as frequent in radiation-associated AML as in spontaneous AML cases. Methods: Sixty one AML samples obtained at diagnosis were analyzed for the presence of MLL abnormalities using fluorescent in situ hybridization and/or reverse transcription polymerase chain reaction. Of these patients, 27 had experienced radiation exposure due to the Chernobyl accident, 32 were non-irradiated (spontaneous AML), and 2 developed therapy-related AML after chemotherapy with topoisomerase II inhibitors. Results: MLL gene translocations were detected in both groups of spontaneous and therapy-related AML (1/32 and 1/2 cases respectively). The sole MLL rearrangement found in the group of radiation-associated AML patients was a duplication of the gene. Conclusion: Our data preclude the involvement of MLL gene translocations in radiation-induced leukemogenesis, but support the assumption that loss and gain of chromosomal material could be crucial in the leukemogenesis of AML patients with the history of radiation exposure due to the Chernobyl accident.
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Publication type Article: Journal article
Document type Review
Keywords acute myelogenous leukemia; ionizing radiation; Chernobyl accident; MLL; translocation; duplication; THERAPY-RELATED MYELODYSPLASIA; SECONDARY LEUKEMIAS; HEMATOLOGICAL MALIGNANCIES; INTERNATIONAL WORKSHOP; CHERNOBYL ACCIDENT; ABNORMALITIES; AMPLIFICATION; SERIES; 11Q23; AML
ISSN (print) / ISBN 0204-3564
Journal Experimental Oncology
Quellenangaben Volume: 27, Issue: 1, Pages: 71-75 Article Number: , Supplement: ,
Publisher Morion
Reviewing status Peer reviewed
Institute(s) Institute of Pathology (PATH)
Institute of Molecular Radiation Biology (IMS)